Who qualifies as a bonafide holder of a certificate of registration issued by the Board?

A bona fide holder of a certificate of registration issued by the Board refers specifically to an individual who has met all the necessary educational and professional requirements set forth by the regulatory body governing the profession—in this case, an aeronautical engineer. This certification typically signifies that the person has demonstrated a certain level of competency and ethical practice in the field, thus qualifying them to practice as a professional in aeronautics.

The other options provided do not imply personal qualifications resulting from individual achievements or credentials. The Board and the Commission relate more to regulatory and administrative roles rather than personal qualifications. The President of the Philippines, while holding a significant position of authority, does not automatically qualify as a bona fide holder of certification in specific trades or professions unless they have pursued the necessary requirements for that certification. Therefore, the aeronautical engineer is the correct answer as that designation inherently carries the right to operate within the field under the framework of the law and professional standards.